﻿/* -*-c++-*- */
/* osgEarth - Dynamic map generation toolkit for OpenSceneGraph
 * Copyright 2016 Pelican Mapping
 * http://osgearth.org
 *
 * osgEarth is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 */
#ifndef OSGEARTHQT_VIEW_WIDGET_H
#define OSGEARTHQT_VIEW_WIDGET_H 1

//#include <osgEarthQt/Common>
//#include "Common"

#include <QGLFormat>
#include <osgEarth/Map>
#include <osgQOpenGL/osgQOpenGLWidget>
#include <osgQOpenGL/osgQOpenGLWindow>
#include <osgViewer/ViewerBase>

#include <QtCore/QTimer>

#define OSGEARTHQT_EXPORT

namespace osgEarth {
namespace QtGui {
using namespace osgEarth;

/**
 * Qt widget that encapsulates an osgViewer::View.
 *
 * There is nothing osgEarth-specific about this class; rather we
 * provide it for convenience. The use case is rendering the map node
 * (or other graph) in multiple Qt windows with a single CompositeViewer.
 */
class OSGEARTHQT_EXPORT ViewWidget : public osgQOpenGLWidget {
public:
  /**
   * Constructs a new ViewWidget, attaching an existing view.
   *
   * @param[in ] view   View to attach to this widget. The widget will install
   *             a new camera in the view. (NOTE: this widget does not take
   *             ownership of the View. You are still responsible for its
   *             destruction)
   * @param[in ] gcToShare Graphics context to share with this new view.
   *             Usually you should just leave this NULL
   */
  ViewWidget(osgViewer::View *view, osg::GraphicsContext *gcToShare = 0L);

  /**
   * Constructs a new ViewWidget, attaching an existing view, with specific GL
   * Format.
   *
   * @param[in ] view   View to attach to this widget. The widget will install
   *             a new camera in the view. (NOTE: this widget does not take
   *             ownership of the View. You are still responsible for its
   *             destruction)
   * @param[in ] format  GL format for the graphics context.  Use this parameter
   * to specify multisampling, for example.
   */
  /*      ViewWidget(osgViewer::View* view, const QGLFormat& format);*/

  /**
   * Access the underlying view.
   */
  osgViewer::View *getView() { return _view.get(); }

  /** dtor */
  virtual ~ViewWidget();

  struct WindowData : public osg::Referenced {
    WindowData(osgQOpenGLWidget *widget = NULL, QWidget *parent = NULL)
        : _widget(widget), _parent(parent) {}
    osgQOpenGLWidget *_widget;
    QWidget *_parent;
  };

protected:
  void paintEvent(QPaintEvent *);

private:
  void init(osg::GraphicsContext *gc);
  osg::GraphicsContext *createOrShareGC(osg::GraphicsContext *gc);

  osg::observer_ptr<osgViewer::View> _view;
};
} // namespace QtGui
} // namespace osgEarth

#endif // OSGEARTHQT_VIEW_WIDGET_H
